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runtime: do not shrink stacks GOCOPYSTACK=0

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R=golang-codereviews
CC=golang-codereviews, khr, rsc
https://golang.org/cl/76070043
This commit is contained in:
Dmitriy Vyukov 2014-03-14 21:11:04 +04:00
parent 22aa54965e
commit b8d40172ce
1 changed files with 2 additions and 0 deletions
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2
src/pkg/runtime/stack.c
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@ -776,6 +776,8 @@ runtime·shrinkstack(G *gp)
uintptr used, oldsize, newsize;
MSpan *span;
if(!runtime·copystack)
return;
oldstk = (byte*)gp->stackguard - StackGuard;
oldbase = (byte*)gp->stackbase + sizeof(Stktop);
oldsize = oldbase - oldstk;